LANE DEPARTURE ALERT SYSTEM(w/ Steering Control) TERMINALS OF ECU


  1. CHECK FORWARD RECOGNITION CAMERA

    Note


    • DTCs may be output when connectors are disconnected during inspection. Therefore, be sure to clear the DTCs using the GTS once the inspection has been completed.

    • Do not apply excessive force to the S18 forward recognition camera connector.

    A002ANGE71

    1. Disconnect the S18 forward recognition camera connector.

    2. Measure the voltage and resistance according to the value(s) in the table below.

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      S18-7 (IGB) - S18-10 (GND) R - W-B Power source Engine switch on (IG) 11 to 14 V
      Engine switch off Below 1 V
      S18-10 (GND) - Body ground W-B - Body ground Ground Always Below 1 Ω

    3. Reconnect the S18 forward recognition camera connector.

    4. Check for pulses according to the value(s) in the table below.

      Tech Tips

      If the waveform is not similar to that shown in the illustration, a malfunction of a CAN bus line, terminating resistor, or the forward recognition camera is suspected.

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      S18-5 (CA1P) - S18-10 (GND) R - W-B CAN communication signal Engine switch on (IG)

      Pulse generation

      (See waveform 1)
      S18-11 (CA1N) - S18-10 (GND) W - W-B CAN communication signal Engine switch on (IG)

      Pulse generation

      (See waveform 2)
      S18-6 (CANH) - S18-10 (GND) B - W-B CAN communication signal Engine switch on (IG)

      Pulse generation

      (See waveform 1)
      S18-12 (CANL) - S18-10 (GND) W - W-B CAN communication signal Engine switch on (IG)

      Pulse generation

      (See waveform 2)

      1. A0027UEE97
        *a 1 V/DIV.
        *b 10 μsec./DIV.

        WAVEFORM 1

        Item Content
        Terminal Name

        Between S18-5 (CA1P) and S18-10 (GND)

        Between S18-6 (CANH) and S18-10 (GND)
        Tester Range 1 V/DIV., 10 μsec./DIV.
        Condition Engine switch on (IG)

        Tech Tips

        The waveform varies depending on the CAN communication signal.

      2. A00290YE89
        *a 1 V/DIV.
        *b 10 μsec./DIV.

        WAVEFORM 2

        Item Content
        Terminal Name

        Between S18-11 (CA1N) and S18-10 (GND)

        Between S18-12 (CANL) and S18-10 (GND)
        Tester Range 1 V/DIV., 10 μsec./DIV.
        Condition Engine switch on (IG)

        Tech Tips

        The waveform varies depending on the CAN communication signal.

  2. CHECK DRIVING SUPPORT ECU ASSEMBLY

    A0027Q3E44

    1. Measure the voltage and resistance according to the value(s) in the table below.

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      F128-7 (B) - F128-28 (GND) R - W-B Power source Engine switch on (IG) 11 to 14 V
      Engine switch off Below 1 V
      F128-23 (SPSW) - F128-28 (GND) V - W-B

      Steering pad switch signal

      (Lane departure alert main switch signal)

      Engine switch off

      Lane departure alert main switch off

      		 1 MΩ or higher

      Engine switch off

      Lane departure alert main switch on

      		 228 to 252 Ω
      F128-28 (GND) - Body ground W-B - Body ground Ground Always Below 1 Ω

    2. Check for pulses according to the value(s) in the table below.

      Tech Tips

      If the waveform is not similar to that shown in the illustration, a malfunction of a CAN bus line, terminating resistor, or the driving support ECU assembly is suspected.

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      F128-8 (CA1P) - F128-28 (GND) B - W-B CAN communication signal Engine switch on (IG)

      Pulse generation

      (See waveform 1)
      F128-9 (CA1N) - F128-28 (GND) W - W-B CAN communication signal Engine switch on (IG)

      Pulse generation

      (See waveform 2)
      F128-10 (CA2H) - F128-28 (GND) G - W-B CAN communication signal Engine switch on (IG)

      Pulse generation

      (See waveform 1)
      F128-11 (CA2L) - F128-28 (GND) W - W-B CAN communication signal Engine switch on (IG)

      Pulse generation

      (See waveform 2)

      1. A0027UEE97
        *a 1 V/DIV.
        *b 10 μsec./DIV.

        WAVEFORM 1

        Item Content
        Terminal Name

        Between F128-8 (CA1P) - F128-28 (GND)

        Between F128-10 (CA2H) - F128-28 (GND)
        Tester Range 1 V/DIV., 10 μsec./DIV.
        Condition Engine switch on (IG)

        Tech Tips

        The waveform varies depending on the CAN communication signal.

      2. A00290YE89
        *a 1 V/DIV.
        *b 10 μsec./DIV.

        WAVEFORM 2

        Item Content
        Terminal Name

        Between F128-9 (CA1N) - F128-28 (GND)

        Between F128-11 (CA2L) - F128-28 (GND)
        Tester Range 1 V/DIV., 10 μsec./DIV.
        Condition Engine switch on (IG)

        Tech Tips

        The waveform varies depending on the CAN communication signal.